2006 450 blew up yesterday?


19 replies to this topic
  • Indyman96

Posted July 05, 2008 - 03:36 PM

#1

I was trail riding yesterday and and my motor starting ticking. I assumed it was the valves out of adjustment and starting heading back to the truck. about 5 miles later the engine dogged down and stalled. i tried kick starting about 5 times and now the kick lever will not move at all. I take prestine care of this bike. any advice on what the problem might be would be greatly appreciated.

  • grayracer513

Posted July 05, 2008 - 03:41 PM

#2

Timing chain, seized cam, oiling troubles,...no way to know without tearing it down.

  • Indyman96

Posted July 05, 2008 - 04:14 PM

#3

im a carpenter so im not confident enough to tear down a head. i guess ill have to take it to a mechanic and get bent over. hopefully i can get this back for under a thousand.

  • biznet1

Posted July 06, 2008 - 02:14 AM

#4

im a carpenter so im not confident enough to tear down a head. i guess ill have to take it to a mechanic and get bent over. hopefully i can get this back for under a thousand.


Did you at least check to see if your oil drain plug fell out?

  • Indyman96

Posted July 06, 2008 - 08:12 AM

#5

oil level is still good

  • 1998YZ400F

Posted July 06, 2008 - 01:25 PM

#6

coolant still good?

  • Ga426owner

Posted July 06, 2008 - 01:40 PM

#7

How many hrs on your ride plz?
It may have jumped timing due to a stretched timing chain

  • nathanyzf426

Posted July 06, 2008 - 01:46 PM

#8

my motor starting ticking. I assumed it was the valves out of adjustment and starting heading back to the truck. about 5 miles later the engine dogged down and stalled. i tried kick starting about 5 times and now the kick lever will not move at all. I take prestine care of this bike. any advice on what the problem might be would be greatly appreciated.


possibly seized bearings thats what happined on my 2 stroke same kind of thing only no ticking more so a little knock and it sounded like i had sand in the engine then it locked up coming into a burm just as i was about to pull over just a thought mate hope its not a big one and i hope you never had as far as i did to push it home it took me 2 n a half hours hahahhaha.............

  • drzjay400e

Posted July 06, 2008 - 05:16 PM

#9

How often do you change your oil and what brand of oil do you use?

  • Indyman96

Posted July 06, 2008 - 05:22 PM

#10

all of the fluids are good, i change the oil every-other ride and use yamalube semi-synthetic.

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  • Indyman96

Posted July 06, 2008 - 05:24 PM

#11

it probably has around 100 hours on it. i bought it used and to my knowledge the only maintenace ever been done on it was oil changes.

  • husqy360

Posted July 06, 2008 - 06:30 PM

#12

wow man that suck. hope it will be ready to run soon.

  • Hatchers

Posted July 13, 2008 - 01:27 PM

#13

Lloyd - So what did you do today?....on a lighter note--->we had a great ride up AF today, 55 degrees in the parking lot at 9:00AM, warmed up to 70 at noon...no carnage or bike break downs...:thumbsup: :thumbsup: :thumbsup:

  • shortburb

Posted July 13, 2008 - 02:20 PM

#14

It may have jumped timing due to a stretched timing chain



I think its pretty hard to get a timing CHAIN to jump teeth

BELTS do it alot...

I think a BROKEN timing chain kinda sorta in a way fits the symptom...if you could kick it several times and then not maybe the chain piled up around the crank sprocket and has jammed....

  • bustersat

Posted July 13, 2008 - 04:07 PM

#15

[I think its pretty hard to get a timing CHAIN to jump teeth]

Mine did just that! Could still kick it over though.

  • swaldrop

Posted July 13, 2008 - 04:27 PM

#16

Since everyone else has proposed a possible failure, I'll chime in as well...

My guess is that you dropped a valve. The right intake to be exact. This allowed you to then kick a bit until the tulip wedged itself between the piston (now shot) and the head (also shot).

Have you had it looked at yet?

  • mjw1

Posted July 14, 2008 - 04:19 PM

#17

I had my zy 400 do that it turned out to be the clutch basket broke. It could be a seized top end you wont know until you tear it down.

  • matt4x4

Posted July 15, 2008 - 04:55 AM

#18

The first time I needed a teardown and got a few prices, I decided it's not rocket science and would undertake it myself.
Man was I glad - if you have some mechanical knowledge, it can be done with ease, you only require simple tools and now, because of places like this - you have unlimited help available at your finger tips to make such a job even easier.
Depending on damage, you may have to get a couple of things machined or fitted by shops, but your bottom line will be 1/5th to 1/3 of what you would have to pay a shop.
If my 8 yr old can do a top end and clutch in his bike - you can do this.

  • husqy360

Posted July 15, 2008 - 09:34 PM

#19

The first time I needed a teardown and got a few prices, I decided it's not rocket science and would undertake it myself.
Man was I glad - if you have some mechanical knowledge, it can be done with ease, you only require simple tools and now, because of places like this - you have unlimited help available at your finger tips to make such a job even easier.
Depending on damage, you may have to get a couple of things machined or fitted by shops, but your bottom line will be 1/5th to 1/3 of what you would have to pay a shop.
If my 8 yr old can do a top end and clutch in his bike - you can do this.


sound so easy !

  • Indyman96

Posted July 22, 2008 - 04:36 PM

#20

Update on my scooter, it turns out it was the timing chain that was loose and ticking and it skipped and got bunched up. Around $500 damage. Luckily it didnt take out the head. Thanks for everyones input.





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